05216 - Beautiful Pyritized 1.03 Inch Unidentified Lower Cretaceous Ammonites Quartz Along its upper edge it

Along its upper edge it preserves a very brilliant layer of enamel

showing well-developed fusion crust

Michael Festnacht suggested it was more similar to Anhanguera due to the wide end of the snout

Specimen prepared exquisitely

Absolutely unique specimen and worthy of study and scientific publication

05216 - Beautiful Pyritized 1.03 Inch Unidentified Lower Cretaceous Ammonites Quartz Along its upper edge itSpecimen of extreme quality. Unidentified species. His suture lines are wonderfully well detailed. It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.